Jinxu Jia

Projects

2014 - Time Series Prediction for the Tweets Popularity with Multivariate INAR(1) process

This is my currect project as well as my thesis project. In this project I built a temporal model to predict user's tweets popularity in Twitter and
improved the prediction accuracy by combining the tweet topic feature.

2014 - Topic Modeling in Twitter

Built a model to generate topics from Twitter dataset.

Improved the quality of topic detection with a Pitman-Yor process-based model.

Developed a stopword-based language identification method.

Improved the language identification speed by eight times compared to contrastive approaches while obtaining 98%+ accuracy.

2013 - Community Membership and Dynamics

Network Theory course project

Investigated community structures of social networks%: Live Journal, a social blog website, and DBLP, a computer science bibliography website.

Discovered that online communities are often built around common interests shared by people, and authors in DBLP prefer following topics to following each other.

2013 - racking Human Faces and Eyes Affected by Scale Variations

Computer and Biological Vision course project

Developed a face detection system to track faces and eyes in video clips by using Viola-Jone's detection model combined with Hyper-complex Fourier Transform saliency detection method.

Capable of tracking multiple faces of different sizes and orientations at the same time.

Improved the eyes detection algorithm performance by using a skin cone filter as a post-processing step.